Buttonhole cutting and stitching machine.



No. 758,037. PATENTED APR. 26, 1904.

E. B. ALLEN.

BUTTONHOLE CUTTING AIID STITCHING MACHINE.

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MJQZV No. 758,037.. PATENTED APR. 26, 1904.

E. B. ALLEN. BUTTONHOLB CUTTING AND STITGHING MACHINE.

APPLIOATIONFILED SEPT. 30, 1903.

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a a.. w I W No. 758,037. PATENTED APR. 26, 1904.

E. B. ALLEN. BUTTONHOLE CUTTING AND STITGHING MACHINE. APPLICATION FILEDSEPT. 30, 1903. H0 MODEL. 6 SHEETS-SHEET 3- FIG. 3.

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No. 758,037. PATBNTED APR. 26', 1904.

E, B. ALLEN. V BUTTONHOLE CUTTING AN-D: STITGHING MACHINE. APPLICATIONFILED 831%. 30, 1903.

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No. 758,031. a PATENTED APR. 26, 1904. E. B. ALLEN.

BUTTONHOLE CUTTING AND STITGHING MACHINE.

- APPLICATION FILED SEPT. so, 1903.

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No; 758,037. 4 PATENTED APR. '26, 1904. E. B. ALLEN. BUTTONHOLE GUTTINGAND STITGHING MACHINE.

APPLIOATION FILED SEPT. 30, 1903.

H0 MODEL. 6 SHEETS-SHEET 6.

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UNITED STATES I Patented April 26, 1904.

PATENT OFFICE.

EDI/YARD B. ALLEN, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGERMANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

BUTTONHOLE CUTTING AN D STITCHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 758,037, dated April26, 1904.

Application filed September 30, 1903. Serial No. 175,150. (No model.)

To all whom 3/]; may concern:

Be it known that I, EDWARD B. ALLEN, a citizen of the United States,residing at Elizabeth, in the county of Union and State of New Jersey,have invented certain new and useful Improvements in Buttonhole Cuttingand Stitching Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to buttonhole cutting and stitching machines, andcomprises certain improvements on the machines fully shown and describedin United States Patents Nos. 734,794 and 736,471, the present inventionrelating more particularly to a buttonhole-cutting mechanism suitablefor use in the machines of said patents in substitution of the cuttingmechanisms therein shown and described.

In the present invention the buttonhole-cutter is given its cutting andreturn strokes by a continuously-rotating cam geared to aconstantly-running shaft, preferably driven from the belt which runs tothe driving-pulley of the machine, and with and from whichcutteractuating cam the cutter is automatically connected anddisconnected by a coupling mechanism, which also operates to transfer ormove the cutter into and out of cutting position. The said coupling andcutter -transferring mechanism is preferably actuated by a cam rotatingwith the cutter-operating cam and with which last-named cam the cutteris momentarily connected at times for the buttonhole-cutting operations,said coupling and out ter-transferring mechanism being idle during thestitching operations, but being controlled by the attendant, so that byreleasing a suitable tripping lever or device it may be set intooperation to perform its proper functions.

In the accompanying drawings, Figure 1 is a side view, partly brokenout, of a buttonhole-machine embodying the present invention. Fig. 2 isa side view, partly in vertical section, looking at the machine from theside opposite that shown in Fig. 1. Fig. 3 is a bottom view of themachine. Figs. 4, 5-, and 6 are detail bottom views with the parts indifferent positions of a part of the cutter-op erating mechanism. Figs.7, 8, and 9 are sectional side views with the parts in difl erentpositions of the cutter and its operating mechanism. Fig. 10 is a detailsectional view of the cutter bar or carrier and some connected parts.Fig. 11 is a perspective View of the tripping-lever and a part of thetreadle-rod. Figs. 12, 13, and 14 are detail views of some of the partsshown in Fig. 11. Fig. 15 is a detail front view showing the cuttingdevice and its cooperating guide plate or bracket, and Fig. 16 is a planview of the cutter-operating cam. 4

Excepting as to the mechanism for operatingthe buttonhole-cutter themachine shown in the accompanying drawings is or may be, essentially,the same as the machine shown by United States Patent No. 736,471,granted August 18, 1903. The said machine comprises av base or bed plate12 to be attached.

and which clutch connection is controlled by a lever 17, pivotallymounted on a bracket 11, attached to the stitching-frame 14 and carryinga spring-pressed plunger 18, these parts, with their connections,constituting the start and stop motion mechanism of the machine.

"he buttonhole-cutter of the present machine is like that of the machineof Patent No. 736,471 in that it comprises a base-plate or foot-piece19, adapted to slide back and forth horizontally on the stationary worksupport or frame and in which base-plate or foot-piece is formed the dieor throat constituting the lower member of the cutting device. Risingfrom the base-plate 19 is a hollow standard 20,

in which is mounted for vertical movements the cutter-bar 21, carryingthe cutter 22. Rigid with the work-support is a steadying and guidingplate 10, having a right-angular slot 23, entered by a pin orroller-stud 24, carried by a cap-plate 25, fixed to an arm 26 preferablyintegral with and extending forward from the cutter-bar 21 and to whicharm the knife or buttonhole-cutter 22 is attached by a set-screw 27.

Depending from the traveling stitchingframe 14 is a bracket 28, in whichis journaled one part or member of an independent shaft provided with apulley 29, which may be driven by the same belt which runs thedriving-pulley 16 on the main shaft of the machine or by a separatebelt. The said independent shaft comprises the parts or members 30, 31,and 32. The member 30 is formed partly hollow and is entered by the partor member 31, having a splined connection with said member or part 30,this construction affording a sliding or telescopic connection betweenthe said parts 30 and 31. The part 31 isconnected by a universal joint33 with the rear end of the part 32, which latter is. journaled in abracket 34, attached to the base-plate 12 and carrying at its forwardend a bevel-pinion 35, meshing with a bevel-gear 36, formed on a camdevice or cam-wheel 37, journaled on a the said parts or members 30,3-1, and 32, may

be supported partly by the movable stitchingframe and partly by thestationary workframe, as described, and still be free to run withoutbinding, as will be understood.

The cam-wheel 37 is provided with a peripheral-grooved cam 39, cngagedattimes by a pin or roller-stud 40, carried at the lower end ofa-pitman-lever 41, having a slotted middle portion embracing a fulcrumpin or stud 42 on the stitching-frame 14, said pitman-lever beingjointed at itsupper end to the cutterbar 21. The grooved cam :39 ispreferably partly cut away at its periphery, as shown, for lightness.Surrounding the hub of the fulcrum-stud 42 is a coil-spring 43, thestress of which serves to hold the cutting device (the connected membersof which are movable toward and from the needles of the machine) in itsinoperative position, (shown in Figs. 1, 2, and 7,) and when the saidcutting device is in such inoperative position the roller-stud 24 willbe in the horizontal part of the slot 23 to hold the cutter-bar 21 andconnected parts in raised position after they have been lifted by thegrooved cutter-operating cam 39 and when the roller-stud 40 on thepitman-lever 41 has been withdrawn from said cam. The said slot incooperation with the roller-stud 24 also serves to steady and guide thecutter-bar andcutter in their horizontal and vertical movements.

The upper face of the cam-wheel 37 is provided with a cam-groove 44,entered by a stud 45, depending from asliding plate or slide 46, movablehorizontally lengthwise of the machinein ways beneath the base-plate 12,said slide being provided with a slot 47, through which the lower end ofthe pitman-lever 41 extends and which slot is of suflicient length topermit said slide to reciprocate idly back and forth without engagingsaid pitman excepting when the latter is coupled thereto. Pivotallyattached to the slide 46 by the screw 48 is an angular coupling-levercomprising the arms 49 and 50. The arm 49 is so constructed and arrangedthat when moved inward from the position shown in Figs. 3 and 4 to theposition shown in Figs. 5 and 6 it will partly lie across the slot 47 inthe slide 46 in such a manner that a shoulder 51 on said arm will engagethe pitman-lever 41. In other words, the said coupling-lever when movedinward to the position shown in Figs. 5 and 6 will practically shortenthe said'slot 47, so that the said slide 46 cannot move without movingthe said pitman-lever horizontally on its fulcrum pin or stud 42; butwhen the said coupling-lever is in the position shown in Figs. 3 and 4andthe pitman-lever has been moved to the position shown in Figs. 2 and7 the said slide will be free to reciprocate. idly without imparting anymovement to said pitman-lever.

The coupling-lever is normally held in the idle position (shown in Figs.3 and 4) by a retaining-lever 52, pivotally attached to the slide 46 bya screw 53 and having on its upper side a lug 54, engaging the arm 50 ofthe said coupling-lever, and which lug is pressed against the outer faceof said arm by a spring 55, attached at one end to a pin 56 on saidslide 46 and at the other end to a pin or hook 57 on the lateral arm 580f the said retaininglever and which arm is provided with a tripping pinor lug 59. When the retaining-lever is tripped, as will presently bedescribed, the

spring 60 will move the coupling-lever to its coupling position. (Shownin Figs. 5 and 6.)

Attached to the bed-plate 12 by a screw 61 is a tripping-lever 62,having at its forward end a hook 63, arranged for engagement with atailpiece 64 on the arm 50 of the coupling lever. A coil-spring 65,connected with the rear arm of the said tripping-lever and with thebed-plate 12, normally tends to hold the forward arm thereof against astop-pin 66 on the said bed-plate. Pivotally attached to the bed-plate12 is a latch-lever 67, the inner end of which is arranged to extendacrossthe path of horizontal "movement of the lower end of thepitman-lever 41 and the outer arm of which is provided with a shoulder68 for engagement with a pin 69 on the tripping-lever 62. A spring 7 0,connected with the said latch-lever and with a stationary pin 71,normally tends to pull the outer arm of said latch-lever rearward, andthus force the inner arm thereof forward.

. In the present machine the clamp is closed by the depression of atreadle-rod 86, as in the machine of United States Patent No. 736,471hereinbefore referred to. This treadlerod 86 is now provided with aninclined lug 72, which when said treadle-rod is depressed engages a lip7 3 on a pivoted dog 74, mounted on the rear end of the tripping-lever62. Said dog 74 is acted on by a coil-spring 75, so that it will yieldagainst the stress of said spring in one direction only, a lug orprojection 76 on said dog engaging a shoulder or part 77 of said leverand against which shoulder said lug is held by said spring, limiting theturning movement of said dog in the other direction. Thus when thetreadle-rod 86 (which moves vertically in a suitable guideway inthe-base-plate 12) is depressed by the attendant to close the work-clampthe inclined lug 72 on said rod will engage the lip 73 of the pivoteddog 74, and thus move the rear end of said lever inward against thestress of the spring 65, causing an outward movement of the forward armof said lever against the tripping pin or lug on the retaining-lever 52to release the retaining-lug 54 from its holding engagement with the armof the couplinglever and moving said lug into the notch or opening 78 ofsaid arm, thus freeing the said coupling-lever, so that its spring willmove it into coupling position, as shown in Figs-5 and 6. WVhen theattendant releases the treadlerod, it will be raised by itslifting-spring, (not shown,) and in this upward movement of thetreadle-rod thedog 74 will yield, as shown in Fig. 13, to permit the lug72 to pass idly by the lip 7 3. i

The operation of the machine is as follows: Power being applied througha suitable driving belt or belts running to the pulleys l6 and 29, thecam device or cam-wheel 37, geared to the continuously-running shaftdriven by the pulley 29, will be in constant rotation. The attendanthaving adjusted the work depresses the treadle-rod 86 to close theworkclamp, and such depression of the treadle-rod moves thetripping-lever 62 and releases the retaining-lever 52, thus leaving thecouplinglever free to be moved to coupling position by its spring 60, ashas been described. The slide 46, operated from the continuously-runningcam-wheel 37, is in constant reciprocation, and at the completion of itsfirst forward or outward movement after the retaining-lever has beentripped the said coupling-lever is moved to coupling position (shown inFigs. 4 and 5) and engages the pitman-lever 41, thus carrying the lowerend of said pitman-lever inward to cause the pin or roller-stud 40 onsaid pitman-lever to be in position to engage owing to a dwell in itsoperating-cam, re-' mainlng momentarily stationary while the cuttingoperation is being effected, and when this has-been done the nextoutward throw of the said slide carries the lower end of thepitman-lever forward to disengage its roller-stud from the cam 39 andits upper end rearward to move the cutting device rearward or away fromthe needles to its first position. At this outward movement of the slidethe wall at the rear end of the slot 47 engages the pitmanlever toeffect its horizontal movement on its fulcrum-pin. When thetripping-lever 62 is moved to tripping position, as shown in Fig. 6, thelatch-lever 67 is moved by its spring 7 0 so that its shoulder 68 willengage the pin 69 on the said tripping-lever, and thus momentarily holdsaid lever in tripping position until said latch-lever is released fromsaid pin. Such release of the latch lever is efiected by the inwardmovement of the pitman-lever, across the horizontal path of movement ofwhich the inner end of, said latch-lever extends, so that the saidlatch-lever is disengaged from said pin 69, as shown in Fig. 6. When thetripping-lever is thus freed from said latchlever, its forward end ismoved inward by the spring against the stop-pin 66, so that its hook 63is then in the path of movement of the tailpiece 64 on thecoupling-lever mounted on the reciprocating slide 46, and thus as saidslide moves outward said tailpiece will come into engagement with saidhook, thereby uncoupling or disengaging the couplinglever from thepitman-lever and moving said coupling-lever to such position that theretaining-lever 52, acted on by its spring 55, .will be moved to causethe retaining-lug 54 to engage the arm 50 of the coupling-lever, and

thus hold said coupling-lever in an idle or inoperative position untilit is again tripped by the depression of the treadle-rod for the nextpiece reciprocates idly with the slide 46, and.

thus any clicking noise due to contact of these parts during the idlemovements of the said slide will be avoided.

It will be observed that the pitman-lever 41 affords a single connectionbetween the two cams or cam-grooves from which are imparted theback-and-forth transferring movements to the connected members of thecutting device and the reciprocating cutting movements to the cutter,thus contributing to simplicity of construction and ease of operation inthe class of machines to which this invention relates. The path ofmovement imparted to the cutterbar and cutter by the pitman-levercorresponds to the shape of the steadying and guiding slot 23 in thestandard 10 entered by the pin or roller-stud 24cthat is to say, thecutting member of the cutting device when a cutting operation is to takeplace will have a continuous motion imparted to it from thepitman-lever, such continuous motion comprising first a straighthorizontal movement, then a slight downward curve, and then a straightvertical movement-the path of this continuous motion being reversed whenthe cutting device is restored to its first or idle position.

After a buttonhole has been cut the stitchforming mechanism will be setinto operation by releasing the stop-motion device in a manner similarto that described in United States Patent No. 736,471 or in any othersuitable manner.

The present invention is not to be understood as being limited to thedetails of construction herein shown and described, as these may bevaried widely without departing from the spirit of the invention.

Having thus described my invention, I claim and desire to secure byLetters Patent 1. In abuttonhole cutting and stitching machine, thecombination with a laterally or horizontally movable buttonhole-cuttingdevice, of a continuously-moving operating device for transferring saidcutting device laterally or horizontally into and out of cuttingposition and for operating the cutter, said cutting device beingnormally disconnected from said operating device, and a couplingmechanism for automatically connecting said cutting device with anddisconnecting it from its said operating device. w

' 2. In a buttonhole cutting and stitching machine, the combination witha continuouslyrotating cutter-operating and cutter-transferringcam-wheel, of a buttonhole-cutting device normally disconnected fromsaid cam-wheel, and a coupling mechanism for automatically connectingsaid cutter with and disconnecting it from said cam-wheel.

3. In a buttonhole cutting and stitching machine, the combination with acontinuouslyrotating shaft which is independent of the driving-shaft ofthe machine, of a cutter-operating cam device actuated from saidindependent shaft, a buttonhole-cutter normally disconnected from itsoperating cam device, and a coupling mechanism for automaticallyconnecting said cutter with and disconnecting it from its operating camdevice.

4- In a buttonhole cutting and stitching machine, the combination with abuttonhole-cutting device, of a cam for moving said cutting device intoand out of cutting position, a cam for imparting cutting movements tothe cutter, and a single connection between said cams and said cuttingdevice.

5. In a buttonhole cutting and stitching machine, the combination with acam wheel or device comprising two cams, of a buttonholecutting devicenormally disconnected from its operating-cams, a single connectionthrough which said cams may transfer said cutting device into and out ofcutting position and operate the moving member of the cuttingdevice, anda coupling mechanism for automatically connecting said cutting devicewith and disconnecting it from its operating-cams.

6. In a buttonhole cutting and stitching machine, the combination withstitchforming devices, an operating-shaft therefor, a stationarywork-frame, and a movable stitchingframe,of a buttonhole-cutting devicemounted on said work frame, a continuously-rotating cam device, foroperating said cutting device, also mounted on said work-frame, and acutter-operating shaft, separate from the stitching-mechanism shaft,geared to said cam device.

7. In a buttonhole cutting and stitching machine, the combination with astationary workframe and a movable stitching-frame, of abuttonhole-cutting device mounted on said workframe, a cam device foroperating said cutting device, also mounted on said work-frame, and anindependent cutter-operating shaft geared to said cam device, said shaftbeing partly mounted on said stitchingframe and partly on saidwork-frame and being formed in two or more parts having a flexible oruniversal joint connection.

. 8. In abuttonhole cutting and stitching machine, the combinationwithabuttonhole-cutting device, of a continuously-operating cam devicefrom which said cutting device is normally disconnected, a pitman leverfor transferring the cutting device to and from cutting position and foroperating the cutter, and an automatic coupling device for moving saidpitman-lever into and out of operative engagement with said cam device.

' 9. In a buttonhole cutting and stitching machine, the combination witha buttonhole-cutting device, of a continuously-operating cam device fromwhich said cutting device is normally disconnected, a pitman-lever fortransferring the cutting device to and from cutting position, and acoupling device for moving said pitman-lever into and out of operativeengagement with said cam device, said coupling device comprising acontinuously-reciprocating slide, actuated from said cam device, andcoupling mechanism carried by said slide.

10. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device, of a continuously-operating cam device fromwhich said cutting device is normally disconnected, a pitman lever fortransferring the cutting device to and from cutting position, a couplingdevice for moving said pitman-lever into and out of operative engagementwith said cam device, said coupling device comprising acontinuously-recipiocating slide, actuated from said cam device, andcoupling mechanism carried by said slide, and tripping mechanism forrendering said coupling mechanism operative and inoperative.

11. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device, of a continuously-operating cam device fromwhich said cutting device is normally disconnected, a pitman lever fortransferring the cutting device to and from cutting position, and acoupling device for moving said pitman-lever into and out of operativeengagement with said cam device, said coupling device comprising acontinuously-reciprocating slide actuated from said cam device, aspring-actuated coupling-lever mounted on said slide, and aspring-actuated retaining-lever for said coupling-lever also mounted onsaid slide, and a tripping-lever, under the control of the attendant,for tripping said retaining-lever when the said pitman-lever is to becoupled to said cam device.

12. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device, of a continuously-operating cam device fromwhich said cutting device is normally disconnected, a pitman lever fortransferring the cutting device to and from cutting position, a couplingdevice for moving said pitman-lever into and out of operative engagementwith said cam device, said coupling device comprising acontinuously-reciproeating slide actuated from said cam device, aspring-actuated retaining-lever for said coupling-lever also mounted onsaid slide, a tripping-lever under the control of the attendant, fortripping said retaining-lever when the said pitman-lever is to becoupled to said cam device, and a latch-lever for momentarily holdingsaid tripping-lever inoperative, but which latch-lever is arranged to beengaged by said pitman-lever for releasing the tripping-lever.

13. In a buttonhole cutting and stitching machine, the combination witha continuouslyrotating cam device, of a buttonhole-cutting device, anormally disconnected connection between said cam device and saidcutting device, a coupling mechanism for operatively joining saidnormally disconnected connection with said cam device when the cuttingdevice is to be operated, a tripping-lever for releasing said couplingmechanism when a buttonhole is to be cut, and a treadle-rod providedwith means for operating said tripping-lever.

14:. In a buttonhole cutting and stitching machine, the combination witha continuouslyrotating cam device, of a buttonhole-cutting device, anormally disconnected connection between said cam device and saidcutting device, a coupling mechanism for operatively joining saidnormally disconnected connection with said cam device when the cuttingdevice is tobe operatecLa tripping-lever for releasing said couplingmechanism when a buttonhole is to be cut, and a treadle-rod providedwith means for operating said tripping-lever, said-means comprising aninclined lug on said treadle-rod cooperating with a spring-pressed dogwith which said tripping-lever is provided 15. In a buttonhole cuttingand stitching machine, the combination with a work-frame and astitching-frame, one of which is movable relative to the other, of acontinuouslyrotating cutter-operating shaft, a continuously-rotatingcutteroperating cam device mounted on one of said frames and geared tosaid shaft, a buttonhole-cutting device movably mounted relative to thestitching devices and normally disconnected from said cutteroperatingcam device,and a coupling mechanism for connecting and disconnectingsaid cutting device and cutter-actuating cam device.

16. In a buttonhole cutting and stitching machine, the combination witha work-frame and a stitching-frame, one of which is movable relative tothe other, of a continuouslyrotating cutter-operating shaft, acontinuously-rotating cutter-operating cam device mounted on one of saidframes and geared to said shaft, a buttonhole-cutting device movablymounted relative to the stitching devices and normally disconnected fromsaid cutteroperating cam device, and a coupling mechanism for connectingand disconnecting said cutting device and cutter-actuating cam device,said cutter-operating shaft being supported partly by one of said framesand partly by the other, and comprising a plurality of parts having aflexible or universal joint connection.

17. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device cofnprising upper and lower cutting membersrigidly connected vertically so as to be movable in unison toward andfrom the stitcl1forming devices of the machine, a continuously rotatingcutter 4 actuating cam device 37, a pitman-lever 11 for transferring thecutting device and for operating the cutter, and which pitman-lever isnormally disconnected from said cutter-actuating cam device, a couplingmechanism serving to vibrate said pitman-lever on its fulcrum, for thepurpose of moving the cutting device into and out of cutting position,and for operatively connecting said pitman-lever with the saidcutter-actuating cam device for operating the IIO cutter, and a trippingdevice by which a part of said coupling mechanism may be thrown intocoupling position to engage said pitmanlcvcr and thereby vibrate it onits fulcrum and move it into coupled connection with the saidcutter-actuating cam device.

' 18. In a buttonhole cutting and stitching machine, the combinationwith a buttonholecutting device comprising upper and lower cuttingmembers rigidly connected vertically so as to be movable in unisontoward and from the stitch-forming devices of the machine, acontinuously-rotating cutter-actuating cam device 37, a pitman-lever 4:1for transferring the cutting device and for operating the cutter, andwhich pitman-lever is normally disconnected from said cutter-actuatingcam device, a coupling mechanism serving to vibrate said pitman-lever onits fulcrum, for the purpose of moving the cutting device into and outof cutting position, and for operatively connecting said pitman-leverwith the said outter actuating cam device for operating the cutter, anda tripping device by which a part of said coupling mechanism may bethrown into coupling position to engage said pitmanlever and therebyvibrate it on its fulcrum and move it into coupled connection with thesaid cutter -actuating cam device, said coupling mechanism comprising acontinuously-reciprocating slide 46 operated from the cutter-actuatingcam device, a spring-pressed couplinglever 50, 51, mounted on saidslide, and a spring-pressed retaining-lever 52, for said coupling-lever,also mounted on-said slide.

19. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device comprising upper and lower cutting membersrigidly connected vertically so as to be movable in unison toward andfrom the stitch-forming devices of the machine, a continuously rotatingcutter actuating cam device 37, a pitman-lever 41 for transferring thecutting device and for operating the cutter, and which pitman-leverisnormally disconnected from said cutter-actuating cam device, acoupling mechanism serving to vibrate said pitman-lever on its fulcrum,for the purpose of moving the cutting device into and out of cuttingposition, and for operatively connecting said pitman-lever with the saidcutter-actuating cam device for operating the cutter, and a trippingdevice by which a part of said coupling mechanism may be thrown intocoupling position to engage said pitmanlever and thereby vibrate it onits fulcrum and move it into coupled connection with the saidcutter-actuating cam device, said coupling mechanism comprising acontinuously-reciprocating slide 46 operated from the cutter-actuatingcam device, a spring-pressed couplinglever 50, 51, mounted on saidslide, and a spring-pressed retaining-lever 52, for said coupling-lever,also mounted on said slide, and the said tripping device comprising aspring-pressed tripping-lever 62 mounted on a part which is stationaryrelative to said slide and provided with a hook 63, and the saidcoupling-lever .being provided with a tailpiece 64 for cooperation withsaid hookwhen the said tripping-lever is in its operative position.

20. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device comprising upper and lower cutting membersrigidly connected vertically so as to be movable in unison toward andfrom the stitch-forming devices of the machine, a continuously rotatingcutter actuating cam device 37, a pitman-lever 41 for transferring thecutting device and for operating the cutter, and which pitman-lever isnormally disconnected from said cutter-actuating cam device, a couplingmechanism serving to vibrate said pitman-lever on its fulcrum, for thepurpose of moving the cutting device into and out of cutting position,and for operatively connecting said pitman-lever with the saidoutter-actuating cam device for operating the cutter, a tripping deviceby which a part of said coupling mechanism may be thrown into couplingposition to engage said pitman-lever and thereby vibrate it on itsfulcrum and move it into coupled connection with the saidcutter-actuating cam device, said coupling mechanism comprising acontinuously-reciprocating slide 46 operated from the cutter-actuatingcam device, a spring-pressed coupling-lever 50, 51, mounted on saidslide, and a springpressed retaining-lever 52, for said couplinglever,also mounted on said slide; and the said tripping device comprising aspring-pressed tripping-lever 62 mounted on a part which is stationaryrelative to said slide and provided with a hook 63, and the saidcoupling-lever being provided with a tailpiece 64 for cooperation withsaid hook when the said trippinglever is in its operative position, anda treadlerod having an inclined lug cooperating with a spring-presseddog with which said trippinglever is provided.

21. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device, of a cam device for moving said cuttingdevice into and out of cutting position and for operating the cutter,and a pitman-lever connecting said cam device with said cutting device;said pitman-lever, in imparting transferring and cutting movements tothe cutting device, at a cutting operation, giving a continuous movementto the cutting member, first in a straight horizontal path, then in aslight downward curve, and then in a straight vertical path, reversingthis continuous movement in restoring the parts to first position.

22. In a buttonhole cutting and stitching machine, the combination witha buttonholecutting device, of a cam device for moving said cuttingdevice into and out of cutting position and for operating the cutter,and a sin- I tinuous'movem'ent in restoring the parts to ID gleconnection between said cam device and first position.

said cutting device; said single connection, in In testimony whereofIafiix my signature in impartingtransferringandcuttingmovements presenceof tWo Witnesses.

to the cutting device at the cutting operation,

giving a continuous movement to the cutting EDWARD ALLEN member, firstin a straight horizontal path, Witnesses:

then in a slight downward curve, and then in H. J. MILLER,

a straight vertical path, reversing this con- H. A. KORNEMANN.

